Kent Police said that more than a hundred people were stuck for more than four hours on the A2 at Lydden near Dover after a lorry jack-knifed.
Once the lorry was cleared from the countbound carriageway, snow drifts built up, in some places up to a metre high due to strong winds.
More top news
Rain will arrive through the early hours for a wet start to Monday. It will eventually brighten up by the afternoon.
Rain on the way tonight, then a wet start to Monday, but it will brighten up through the day with sunny spells for the afternoon.
One of nine dogs dumped on the streets of Winchester, unable to see or stand properly, is fighting for its life.